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-rw-r--r--new-luxc/source/luxc/synthesizer/function.lux4
1 files changed, 4 insertions, 0 deletions
diff --git a/new-luxc/source/luxc/synthesizer/function.lux b/new-luxc/source/luxc/synthesizer/function.lux
index 42aa7a6cd..e8b2a7ec4 100644
--- a/new-luxc/source/luxc/synthesizer/function.lux
+++ b/new-luxc/source/luxc/synthesizer/function.lux
@@ -44,6 +44,10 @@
(-> Nat Int)
(|> idx n.inc nat-to-int (i.* -1)))
+(def: #export (captured-idx idx)
+ (-> Int Nat)
+ (|> idx (i.* -1) int-to-nat n.dec))
+
(def: #export (to-local idx)
(-> Nat Int)
(nat-to-int idx))